VGPU: Define vgpu resource class

This patch is to add definition of resource class for VGPU and
VGPU_DISPLAY_HEAD, and there will be a series of patches to implement
the whole vgpu feature.

Partially Implements: blueprint add-support-for-vgpu

Change-Id: Ie363453eb9856b39e4ededc5e76807b3d165a1c5

nova/objects/fields.py

@@ -475,12 +475,14 @@ class ResourceClass(StringField):
     NUMA_THREAD = 'NUMA_THREAD'
     NUMA_MEMORY_MB = 'NUMA_MEMORY_MB'
     IPV4_ADDRESS = 'IPV4_ADDRESS'
+    VGPU = 'VGPU'
+    VGPU_DISPLAY_HEAD = 'VGPU_DISPLAY_HEAD'
 
     # The ordering here is relevant. If you must add a value, only
     # append.
     STANDARD = (VCPU, MEMORY_MB, DISK_GB, PCI_DEVICE, SRIOV_NET_VF,
                 NUMA_SOCKET, NUMA_CORE, NUMA_THREAD, NUMA_MEMORY_MB,
-                IPV4_ADDRESS)
+                IPV4_ADDRESS, VGPU, VGPU_DISPLAY_HEAD)
 
     # This is the set of standard resource classes that existed before
     # we opened up for custom resource classes in version 1.1 of various

nova/tests/functional/api/openstack/placement/gabbits/resource-classes.yaml

@@ -40,7 +40,7 @@ tests:
   GET: /resource_classes
   response_json_paths:
   response_json_paths:
-      $.resource_classes.`len`: 10  #  Number of standard resource classes
+      $.resource_classes.`len`: 12  #  Number of standard resource classes
       $.resource_classes[0].name: VCPU
 
 - name: non admin forbidden
@@ -117,9 +117,9 @@ tests:
 - name: list resource classes after addition of custom res class
   GET: /resource_classes
   response_json_paths:
-      $.resource_classes.`len`: 11  # 10 standard plus 1 custom
-      $.resource_classes[10].name: $ENVIRON['CUSTOM_RES_CLASS']
-      $.resource_classes[10].links[?rel = "self"].href: /resource_classes/$ENVIRON['CUSTOM_RES_CLASS']
+      $.resource_classes.`len`: 13  # 12 standard plus 1 custom
+      $.resource_classes[12].name: $ENVIRON['CUSTOM_RES_CLASS']
+      $.resource_classes[12].links[?rel = "self"].href: /resource_classes/$ENVIRON['CUSTOM_RES_CLASS']
 
 - name: update standard resource class
   PUT: /resource_classes/VCPU

nova/tests/unit/objects/test_fields.py

@@ -346,6 +346,8 @@ class TestResourceClass(TestString):
             ('NUMA_THREAD', 'NUMA_THREAD'),
             ('NUMA_MEMORY_MB', 'NUMA_MEMORY_MB'),
             ('IPV4_ADDRESS', 'IPV4_ADDRESS'),
+            ('VGPU', 'VGPU'),
+            ('VGPU_DISPLAY_HEAD', 'VGPU_DISPLAY_HEAD'),
         ]
         self.coerce_bad_values = [object(), dict()]
         self.to_primitive_values = self.coerce_good_values[0:1]